Hornby R30134 LMS, Princess Royal Class 'The Turbomotive', 4-6-2, 6202 - Era 3Product Info Staniers Turbomotive, often referred to as The Turbo was an experimental non condensing steam turbine locomotive inspired by similar Swedish Ljungstrm locomotives. No. 6202 was built as the third of the 'Princess Royal' Class by Stanier, an attempt to innovate steam locomotive technology with the advent of Dieselisation and Grouping upending the traditional notions of rail transport.